Phase separation and effect of strain on magnetic properties of Mn${}_3$Ga${}_{1-x}$Sn${}_x$C

Abstract

While the unit cell volume of compounds belonging to the Mn${}_3$Ga${}_{1-x}$Sn${}_x$C, (0 $\le x\le$ 1) series shows a conformity with Vegard's law, their magnetic and magnetocaloric properties behave differently from those of parent compounds Mn${}_3$GaC and Mn${}_3$SnC. A correlation between the observed magnetic properties and underlying magnetic and local structure suggests that replacing Ga atoms by larger atoms of Sn results in the formation of Ga-rich and Sn-rich clusters. As a result, even though the long range structure appears to be cubic, Mn atoms find themselves in two different local environments. The packing of these two different local structures into a single global structure induces tensile/compressive strains on the Mn${}_6$C functional unit and is responsible for the observed magnetic properties across the entire solid solution range.

References in corpus (7)

• Large magnetic entropy change near room temperature in antipervoskite SnCMn3
• Tunable negative thermal expansion related with the gradual evolution of antiferromagnetic ordering in antiperovskite manganese nitrides Ag1-xNMn3+x (0<x<0.6)
• Effect of carbon content on magnetostructural properties of Mn${}_3$GaC
• Effect of local structural distortions on magnetostructural transformation in Mn${}_3$SnC
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• Phase separated magnetic ground state in Mn${}_3$Ga${}_{0.45}$Sn${}_{0.55}$C
• Mechanism of magnetostructural transformation in multifunctional Mn${}_3$GaC

Cited by in corpus (3)

• Modulations in magnetostructural coupling in C and Sn deficient Mn${}_3$SnC
• $d$ band filling and magnetic phase separation in transition metal-doped Mn${}_3$SnC
• Absence of first order magnetic transition, a curious case of Mn3InC